Server-Machine-Driven Hint Generation for Improved Web Page Loading Using Client-Machine-Driven Feedback

ABSTRACT

Embodiments seek to improve web page loading time using server-machine-driven hint generation for based on client-machine-driven feedback. For example, client computers having page renderers are in communication with content servers and hinting processors. The hinting processors can use hinting feedback from multiple page rendering instances to automatically generate hints for optimizing loading and/or rendering of those pages. In some implementations, in response to page requests from the page renderers, content servers can request hints from hinting processors and send those hints to the requesting page renderers for use in improving the page loading experience. In other implementations, in response to page requests from the page renderers, content servers can instruct the requesting page renderers to contact an appropriate hinting processor and to retrieve appropriate hints therefrom for use in improving the page loading experience.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.14/729,949, filed Jun. 3, 2015, titled “Server-Machine-Driven HintGeneration for Improved Web Page Loading Using Client-Machine-DrivenFeedback,” and U.S. Patent Application No. 62/007,374, filed Jun. 3,2014, titled “Server Based Embedded Web Page Feedback and PerformanceImprovement,” the entireties of both of which are hereby incorporated byreference.

FIELD

Embodiments relate generally to client-server network communicationsperformance, and, more particularly, to improving web page loading timeusing server-machine-driven hint generation based onclient-machine-driven feedback.

BACKGROUND

Web page transmission, in which a user selects web page content andreceives objects, is a core part of the Internet experience for Internetusers. While the experience of users is typically a single selectionfollowed by the viewing of a web page that is presented on the screen,the process of presenting the web page on the screen can involve a largenumber of objects and multiple request/response round-tripcommunications from the user system to one or more web servers that areproviding objects for the web page. Additionally, each object may beassociated with a number of different phases as part of the inclusion ofthe object in a web page that is presented to a user. Each object thatis part of a web page and each phase associated with each object maycontribute to an overall page load time that is experienced by a deviceuser as delay

SUMMARY

Among other things, systems and methods are described for improving webpage loading time using server-machine-driven hint generation based onclient-machine-driven feedback. Some embodiments operate in context ofclient computers having page renderers in communication, over acommunications network, with content servers and hinting processors. Thehinting processors use hinting feedback from rendering of web pages bythe page renderers to automatically generate and/or refinemachine-learning-based hint models for optimizing the rendering (e.g.,loading and outputting) of those web pages. Instead of the hintingprocessors being in persistent communication with the client computersand/or otherwise monitoring the client computers' behavior over manypage transactions (e.g., across multiple content servers), the hintingprocessor behavior can be driven by the content server. In someimplementations, in response to page requests from the page renderers,content servers can request hints from hinting processors and send thosehints to the requesting page renderers for use in improving the pageloading experience. In other implementations, in response to pagerequests from the page renderers, content servers can instruct therequesting page renderers to contact an appropriate hinting processorand to retrieve appropriate hints therefrom for use in improving thepage loading experience.

According to one set of embodiments, a method is provided for improvingweb page loading time in a communications network. The method includes:receiving a hinting request at a hinting processor from a content serverin association with a page request received by the content server from aclient page renderer, the page request being for a web page having anumber of page objects; generating a hinting response by the hintingprocessor in response to the hinting request, the hinting responseincluding hints directed to optimized fetching of an anticipated set ofthe page objects anticipated to be used to render the web page accordingto hinting information maintained by the hinting processor;communicating the hinting response from the hinting processor to thecontent server in response to the hinting request, thereby causing thecontent server to direct the client page renderer to render the web pageat least according to the hinting response; receiving hinting feedbackat the hinting processor from the client page renderer subsequent to theclient page renderer rendering the web page at least according to thehinting response, the hinting feedback indicating a rendered set of pageobjects used to render the web page; and updating the hintinginformation according to the hinting feedback.

According to another set of embodiments, another method is provided forimproving web page loading time in a communications network. The methodincludes: receiving a hinting request at a hinting processor from aclient page renderer in response to the client page renderer executing ahinting script that identifies a network location of the hintingprocessor, the hinting script communicated to the client page rendererby a content server in response to the client page renderercommunicating a page request to the content server for a web page havinga number of page objects; generating a hinting response by the hintingprocessor in response to the hinting request, the hinting responseincluding hints directed to optimized fetching of an anticipated set ofthe page objects anticipated to be used to render the web page accordingto hinting information maintained by the hinting processor;communicating the hinting response from the hinting processor to theclient page renderer in response to the hinting request, thereby causingthe client page renderer to render the web page at least according tothe hinting response; receiving hinting feedback at the hintingprocessor from the client page renderer subsequent to the client pagerenderer rendering the web page at least according to the hintingresponse, the hinting feedback indicating a rendered set of page objectsused to render the web page; and updating the hinting informationaccording to the hinting feedback.

According to another set of embodiments, another method is provided forimproving web page loading time in a communications network. The methodincludes: first communicating, from a client page renderer to a contentserver over a communications network, a page request for a web pagehaving a number of page objects; receiving a page response at the clientpage renderer from the content server over the communications network inresponse to the page request, the page response having a first pageobject and a hinting script; second communicating, by the client pagerenderer in response to executing the hinting script, a number of objectrequests for the page objects, at least a portion of the object requestsindicating an anticipated set of the page objects used to render the webpage as defined by a hinting processor associated with the hintingscript; rendering the web page by the client page renderer by receivingthe page objects from the content server in response to the objectrequests; monitoring hinting feedback indicating a set of rendered pageobjects used to render the web page; and third communicating the hintingfeedback from the client page renderer to the hinting processor

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure is described in conjunction with the appendedfigures:

FIG. 1 shows an illustrative communications system environment thatprovides a context for various embodiments;

FIGS. 2A and 2B show a flow diagram of an illustrative method forimproving web page loading, according to some embodiments;

FIGS. 3A and 3B show a flow diagram of another illustrative method forimproving web page loading, according to other embodiments;

FIG. 4 shows an illustrative page renderer for use with variousembodiments;

FIG. 5 illustrates aspects of an object associated with a web pagetransaction that may be used to create feedback information and hintsaccording to certain embodiments described herein;

FIG. 6 illustrates aspects of a web page transaction that may be used tocreate feedback information and hints according to certain embodimentsdescribed herein;

FIG. 7 illustrates a block diagram of one implementation of a computingdevice that may be used in accordance various embodiments presentedherein; and

FIG. 8 illustrates a block diagram of one implementation of acommunications system that may be used with different aspects of variousembodiments presented herein.

In the appended figures, similar components and/or features can have thesame reference label. Further, various components of the same type canbe distinguished by following the reference label by a second label thatdistinguishes among the similar components. If only the first referencelabel is used in the specification, the description is applicable to anyone of the similar components having the same first reference labelirrespective of the second reference label.

DETAILED DESCRIPTION

In the following description, numerous specific details are set forth toprovide a thorough understanding of the present invention. However, onehaving ordinary skill in the art should recognize that the invention canbe practiced without these specific details. In some instances,circuits, structures, and techniques have not been shown in detail toavoid obscuring the present invention.

Embodiments described herein seek to improve web page loading time (and,thereby, end user experience) using server-machine-driven hintgeneration based on client-machine-driven feedback. For example, afeedback script or other client-machine-driven technique may be used togenerate feedback information on the actual page rendering process thatoccurs in a web browser. The feedback information may then be used toupdate a machine-learning driven hinting model, which can be used togenerate hints. The hints can be provided via scripts, embedded in webpage code, as part of a web page header, and/or in any other suitablemanner.

As used herein “web page transaction” refers to a communication betweena client computer and a server computer to transfer a plurality ofobjects to the client computer which may be presented to the user aspart of a web page. As used herein, a “web page” is intended to broadlyrefer to any type of page sent over a communications network andconsisting of multiple page objects. For example, the web page can be atypical web page used in World Wide Web communications, a page (e.g.,screen) of an application (e.g., an app, etc.), or any other type of webpage. Further, reference to “web” is not intended to be limited to theInternet or the World Wide Web; rather, the “web” can include any publicor private communications network. Further, the term “page renderer,” asused herein, is not intended to be limited to any particular process ina web browser; rather “page renderer” can refer to any process or set ofprocesses used to load and/or render an end-user experience of a webpage and its page objects in a browser or other application (i.e.,“render” and “load” are used herein to generally express formulating thepage using the page objects). In one example, the web pages can includeweb browser pages; the page renderer can include a web browser; and thepage objects can include uniform resource locators (URLs), hypertextmarkup language (HTML) objects, scripts, and/or other server-sideobjects used (e.g., needed in some or all instances) by the web browserto render the web pages. In another example, the web pages can includescreens of an app (e.g., or any other application); the page renderercan include the app (e.g., the portion of the app that handlesinput/output interactions); and the page objects can be the audiovisualcontent of the rendered screens.

For example, in one embodiment, a web server computer (e.g., or othercontent server) may inject a feedback script into the initial responseto a client computer's request for the web page. At a browser of theclient computer, the feedback script may then gather information relatedto the web page transaction. Alternatively, the page renderer (e.g.,browser) can be designed to automatically gather the information relatedto the web page transaction. This information may include a list of allobjects requested as part of the transaction, a list of objects neededto present an initial incomplete web page on an output of a clientdevice, a set of cookies (and/or hashed versions of those cookies)associated with the client device or processing operating on the clientdevice, a set of cookies (and/or hashed versions of those cookies)associated with one or more web page objects or client processes, a setof timings associated with each object, a set of timings associated withthe overall page rendering process, a set of relationships between theobjects, details associated with cached objects, object sizes, objecttypes, object fingerprints or checksums, object position on the page,cookie meta-data, redirect chains, alternative content sources userduring a transaction such as content delivery networks (CDNs) that maybe used for some objects, details of the domain name servers (DNS) usedduring the transaction, secure connection meta-data, and any other suchdetails.

When the page renderer has completed presenting the web page to theuser, this feedback information gathered by the feedback script may thenbe sent to an assistance service operating as part of or in conjunctionwith the web server computer. The feedback information may be processedeither to automatically update the root object, or to generate hintsthat may be sent along with the root object in a later instance of theweb page transaction or a similar transaction. The update to the rootobject or the hints may enable a page renderer to improve performance(loading time) of the later instance of the web page transaction. Thisimprovement may be realized by lowering an overall time from a userselection to a completed presentation of the page to a user. Thisimprovement may also be realized by lowering an initial time topresentation of an incomplete version of the web page that may befunctional for user purposes. In one potential embodiment, a lowering ofthe overall time may result from the use of latency information inconjunction with other feedback information to determine howaggressively a page renderer will attempt to prefetch child objects aspart of future instances of the web page transaction.

Objects used in such a web page may include HTML files, cascaded stylesheet (CSS) files, image files, video files, or any other such objects.Reference to different instances of a web page transaction refers to thetransaction being performed by different client computer at differenttimes, or the same transaction being performed by a single clientcomputer at different times. These different instances of a web pagetransaction may include variations in the objects that are part of theweb page transaction, either due to customization across differentclient computers, or updates to the web page over time. Further,different web pages and different web page transactions may includeobjects that are the same or similar. In certain embodiments, feedbackinformation and hints generated for an object seen in one web pagetransaction may be applied as hints in a transaction for a separate webpage if the root URLs are similar or if there is a sufficient degree ofcommonality between the sets of objects is used in both web pagetransactions. Similarly, as used herein, terms, like “render” and “load”are used broadly (and, in most cases, interchangeably) to refergenerally to enabling interaction by a user with a page object via apage renderer interface. For example, rendering or loading can includedisplaying and/or formatting in context of static visual content,playing in context of video or audio content, executing in context ofcode or other scripts, etc.

Further, as used herein, “root” refers to an initial portion of a webpage transaction that is initiated directly by a user selection oraction. For example, a user clicking on a web page link initiates a rootrequest for that link. The root response is the response directlyresponding to that root request. The root response also includes a rootobject. This root object includes information that enables a pagerenderer to identify, either directly or indirectly, the other objectsneeded to render and present the complete web page. In some instances,the “root” object can include a primary child object in an iframe on apage, or the like (e.g., where each of multiple iframes are separatelyhinted from different content servers).

“Redirect” refers to a response to a root request that directs therequesting client device to a different source for an object. Forexample, a client device may send a root request and receive back aredirect response. The client device may then send a redirected childrequest to the redirect target indicated in the redirect response. Incertain embodiments, a response to the redirected child request may theninclude a feedback script or hints. Thus, while certain embodimentsdescribe operation with a root request and response, in variousembodiments, any root, child, or redirected response described hereinmay include a feedback script as described in the various embodimentsherein.

“Child” requests and responses are the follow-on requests and responsesthat result, either directly or indirectly, from embedded or calculatedreferences to other objects in root objects or other child objects. Thechild objects, requests, and responses are always one or more stepsremoved from the user action by a root that directly responds to theuser action. Child objects may include references to additional childobjects, resulting in a chain of requests and responses. Each of theabove requests and responses may be hypertext transport protocol (HTTP)requests and responses including HTTP headers and an associated message.In various embodiments, other communication protocols may be used.

As used herein, “feedback information” refers to any informationdescribing a web page transaction that may be captured by a clientcomputer, by a page renderer operating on a client device, by a webserver, by a proxy server in a communication path between a clientdevice and a web server, or by any other device involved with a web pagetransaction. A “hint,” “hints,” or “hint information” as describedherein refers to information that may be provided to a client computer,a page renderer operating on a client computer, or a proxy systeminvolved with a web page transaction that allows optimization of the webpage transaction. In certain embodiments, feedback information may beused to create hints. The feedback and related hints may be directed toprefetching objects, downloading objects, object caching, or networkingallocations for communications that may be optimized as part of a webpage transactions. Examples of hints and feedback information may befound in U.S. patent application Ser. No. 13/372,347 “BROWSER BASEDFEEDBACK FOR OPTIMIZED WEB BROWSING,” U.S. patent application Ser. No.14/212,538 “FASTER WEB BROWSING USING HTTP OVER AN AGGREGATED TCPTRANSPORT,” and Ser. No. 14/276,936 “CACHE HINTING SYSTEMS”, each ofwhich is expressly incorporated by reference for all purposes in thisapplication.

FIG. 1 shows an illustrative communications system environment 100 thatprovides a context for various embodiments. The communications systemenvironment 100 includes client computer(s) 110, content server(s) 120,and hinting processor(s) 130 in communication over a communicationsnetwork 140. Network 140 can include any one or more suitablecommunications networks and/or communications links, including any widearea network (WAN), local area network (LAN), private network, publicnetwork (e.g., the Internet), wired network, wireless network, etc.Typically, the communications system environment 100 can include manyclient computers 110 interfacing with multiple content servers 120 overthe communications network 140.

As described herein, according to various embodiments, the contentservers 120 can be in communication with one or more hinting processors130 directly and/or via the communications network 140, and/or theclient computers 110 can be in communication with the hinting processors130 via the communications network 140 (e.g., at the direction of thecontent servers). Some embodiments are directed to improving the loadingand rendering of page objects that make up web pages, screens ofapplications, and/or other similar web page contexts. In such a context,it may be typical for a client computer 110 to make a request for a webpage that is provided (e.g., hosted) by a content server 120. Loadingand rendering the requested web page can involve subsequently requestingand receiving a number (sometimes a large number) of page objects thatmake up the web page (e.g., visual content, audio content, executablescripts, etc.). Loading and rendering of such a web page can be improvedby requesting objects at particular times (e.g., by prefetching objectsin a particular order, etc.), and the client computer can be instructedas to such improvements using “hints,” as described herein. The webobjects may be identified in the set of hints by URL, by a combinationof URL and regular expression, by a script, or by other similartechniques. Loading and rendering of such a web page can also beimproved by hints that support pre-resolving domain names,pre-establishing TCP connections, pre-establishing secure connections,predetermining and minimizing the redirect chain and similar functionsthat can be performed prior to content load that improve overall pageload performance. Additionally, the probability that an object will beneeded and the priority it should be given by the browser may becommunicated to further improve page load time. Additionally, thevarious image, video and document formats that may be associated with agiven object may be sent to the device in advance as hints, therebyallowing the renderer to dynamically adjust to network conditions andconstraints and minimize data traffic associated with pre-fetchedobjects. Additionally, hints may guide the selection of CDNs, caches, orother server locations so as to improve page load time. Embodimentsdescribed herein provide such hints to the client computers in a mannerthat is computationally generated (e.g., generated by machine based onfeedback and analysis, as opposed to being generated manually by codersbased on assumptions) and content server-driven (e.g., provided toclient computers without relying on persistent connections betweenclient computers and hinting servers).

Such hinting functionality can be implemented in a number of differentways. To that end, the communications system environment 100 of FIG. 1is intended to support a number of different implementations of variousembodiments, so that some implementations may have more or fewercomponents, in communication in the same or different ways, exchangingthe same or different types of data as those illustrated in FIG. 1. Forexample, in one set of embodiments, each content server 120 can informclient computers 110 of relevant hinting information relating torequested web pages by consulting with a hinting processor 130 that iseither part of, or in communication with, the content server 120. Inanother set of embodiments, each content server 120 can direct clientcomputers 110 to establish communications with an appropriate hintingprocessor 130 to directly retrieve relevant hinting information relatingto requested web pages. These and other embodiments are described morefully herein.

Client computer(s) 110 can be implemented as any suitable computingdevice having memory resources, processing resources, and networkcommunication resources. For example, the client computers 110 can bedesktop computers, tablet computers, laptop computers, mobile phones,personal data assistants, network enabled wearable devices, networkenabled home appliances, etc. Each client computer 110 includes one ormore page renderers 115. Page renderer 115 can include any systemimplemented in a client computer 110 that enables a web pagetransaction, and that is used, at least in part, for rendering a webpage and presenting it to a user via an output device of the clientcomputer 110.

Content server(s) 120 can generally include any one or morecomputational environments for serving (e.g., hosting and/or otherwiseproviding access to) web page content to the client computers 110 viathe communications network 140. For example, the content servers 120 caninclude web servers, content distribution networks (CDNs), caches, orthe like. As illustrated, the content servers 120 can include, or be incommunication with, one or more data storage systems having web pages125 stored thereon. As described herein, it is assumed that the webpages 125 are made up of multiple page objects 127. For example, loadingone of the web pages 125 can involve requesting, receiving, andrendering the page objects 127 that make up the web page 125. Some orall of the page objects 127 of the web pages 125 served by the contentservers 120 can be stored in the data storage systems, or some or all ofthe page objects 127 can be stored remote from the content servers 120.

In some implementations, the content servers 120 are configured toreceive page requests 141 for web pages 125, and to communicate pageresponses 143 including one or more page objects 127 based on the rootrequest. In some implementations, the page responses 143 can includehinting scripts 145. The hinting scripts 145 can be sent in any suitablemanner in conjunction with the page responses 143, for example, as aseparate or stand-alone response (e.g., before or after a root responseto a web page request), as part of one or more page objects 127 in aresponse, in the same response as one or more page objects 127, etc. Forexample, the hinting scripts 145 can be injected into the page responses143 as part of web page 125 code (e.g., as part of the HTML source codefor a web page, etc.), as part of a data protocol or format (e.g., inHTML headers, etc.), or in any other suitable manner.

As described herein, the hinting scripts 145 can include different typesof information in different types of implementations. In oneillustrative type of implementation, the hinting script 145 is generatedby the content server 120 to include hints 150 a relating to renderingthe requested web page 125. In another illustrative type ofimplementation, the hinting script 145 is generated by the contentserver 120 to include a link, address, or other instruction directingthe requesting client computer 110 to contact an appropriate hintingprocessor 130 to receive hints 150 b relating to rendering the requestedweb page 125. Further, in some implementations, the hinting script 145includes instructions for monitoring, generating, and/or communicatinghinting feedback 147 relating to the actual rendering of the requestedweb page 125. In such implementations, the hinting feedback 147 can becommunicated from the client computers 110 directly to the hintingprocessors 130, to the hinting processors 130 via the content servers120, or in any other suitable manner. The information included in thehinting scripts 145 and/or the execution thereof can depend oncharacteristics of the client computers 110 and/or other components ofthe communications system environment 100. For example, if a clientcomputer 110 is known not to support hints 150, but does supportfeedback; only the feedback script may be injected. In otherembodiments, if the client computer 110 does not support feedbackinformation (e.g., due to privacy settings or other such issues), clientcomputer 110 may still use hints 150 derived from feedback informationprovided by other client computers 110.

The one or more hinting processors 130 can be implemented as one or morestand-alone server computers, as part of one or more content servers120, and/or in any other suitable manner for maintaining and updatinghinting information 135 according to hinting feedback 147 from clientcomputers 110, and computing hints 150 from the hinting information 135.The hinting information 135 can be stored in one or more data storesthat are part of, coupled with, or in communication with the hintingprocessors 130, or in any other suitable manner. Embodiments supportmany different types of hinting information 135 and hints 150 generatedtherefrom, including, for example, information relating to which pageobjects 127 are needed to render the web pages 125, timing informationrelating to those page objects 127 (e.g., the order and timing by whichthe page objects 127 should be requested), etc. The hinting information135 can be maintained, computed, updated, etc. in any suitable manner,including according to the hinting feedback 147 received from one ormore client computers 110. Embodiments of the hinting processor 130apply machine learning techniques to hinting feedback 147 from multiplerelated web page transactions (e.g., from multiple instances of multipleclient computers 110 rendering the same (or sufficiently similar) webpages). Received hinting feedback 147 can be used to refine, hone,update, reinforce, or otherwise improve machine-driven hinting modelsmaintained by the hinting processor 130, thereby facilitating generationand communication of optimized hints.

In some implementations, the hinting information 135 is stored withoutreference to the originating client computers 110 or page renderers 115that provided associated hinting feedback 147 (e.g., the receivedhinting feedback 147 is anonymized, aggregated, etc.). In otherimplementations, the hinting information 135 is stored with reference tothe originating client computers 110 or page renderers 115 that providedassociated hinting feedback 147 (e.g., to enable certain hints totailored to client computers 110 and/or page renderers 115). In otherimplementations, hinting information 135 can be aggregated,semi-anonymized, and/or otherwise processed. For example, this canreduce privacy implications of collecting feedback information, whileenabling geographic-based hints or hints associated with particularcontent delivery networks (CDNs) (e.g., according to groups of internetprotocol (IP) addresses associated with groups of client computers 110that have certain geographies, associations with CDNs, etc.).

The client computers 110 can render requested web pages 125 according tohints 150 generated from the hinting information 135 that effectivelypredict which page objects 127 the client computers 110 will need atwhich times to optimally render the web pages 125; the client computers110 can actually render the web pages 125 according at least to thereceived hints 150; the actual rendering of the web pages 125 can bemonitored by the client computers 110 to determine which page objects127 were actually used to render the pages according to which timings;and the monitored information can be fed back (i.e., as the hintingfeedback 147) to the hinting processors 130 for use in updating thehinting information 135 and refining future hint 150 generation. In someimplementations, the client page renderers 115 receive feedbackinstructions (e.g., as part of the hinting scripts 145), and theyprovide the hinting feedback 147 according to the hinting scripts 145.In other implementations, the client page renderers 115 are configuredto automatically generate and/or provide the hinting feedback 147without instruction from the hinting scripts 145 (e.g., and/or inconjunction with the hinting scripts 145, in contravention of thehinting scripts 145, or otherwise as desired).

As described below, hints 150 can be provided in various ways accordingto different implementations. The page renderers 115 can request webpages 125 from the content servers 120 using page requests 141, and theclient computers 110 can receive page objects 127 for the requested webpages 125 from the content servers 120 in page responses 143. The pageresponses 143 can include the page objects 127 and hinting scripts 145.In some implementations, in response to the page requests 141, thecontent servers 120 can request hints 150 from (i.e., send hintingrequests to) the hinting processors 130 (which may be part of thecontent servers 120 or separate from the content servers 120), Inresponse to the hinting requests, the hinting processors 130 can returnhints 150 (shown as hints 150 a) to the content servers 120, which canbe communicated back to the requesting client computers 110 (e.g., aspart of the hinting scripts 145, injected into page code, embedded inone or more page objects 127, etc.). In other implementations, inresponse to the page requests 141, the content servers 120 can sendhinting scripts 145 to the requesting client computers 110, and thehinting scripts 145 can include instructions for receiving appropriatehints 150 from appropriate hinting processors 130 (e.g., executable codewith network addresses of the hinting processors 130, credentials,etc.). When the client computers 110 execute the hinting scripts 145,they may establish communication with one or more hinting processors130, communicate hinting requests to those hinting processors 130, andreceive hints 150 (shown as hints 150 b) from the hinting processors130.

FIGS. 2A and 2B show a flow diagram of an illustrative method 200 forimproving web page loading, according to some embodiments. FIGS. 2A and2B, though spread over two pages, are intended to represent a singlemethod 200, where connector “A” links the portions of the method 200.The method 200 is described in context of system components describedwith reference to FIG. 1, including a page renderer 115, a contentserver 120, and a hinting processor 130. Attribution of method stages toparticular system components is intended for added clarity, and shouldnot be construed as limiting the method stages to the particular systemarchitectures shown in FIG. 1.

Embodiments of the method 200 begin on FIG. 2A at stage 204 bycommunicating, from the client page renderer 115 to the content server120 over a communications network (e.g., network 140 of FIG. 0.1), apage request for a web page having a number of page objects. The pagerequest can be a root request or any other suitable request, and can beissued in response to a user click in a web page interface, a voicecommand, a mouse hover, a touchpad or touchscreen interaction, akeyboard entry, a search query, or any other such user election thatinitiates a web page transaction. At stage 208, the content server 120can generate a hinting request in response to receiving the pagerequest, and the content server 120 can communicate the hinting requestto the hinting processor 130. In some implementations, communicating thehinting request can involve determining whether hinting information isavailable for this page transaction. For example, the content server 120can communicate with the hinting processor 130 to determine whether anyhints (or underlying hinting information) is available from previousanalyses of transactions involving the requested web page. Some suchimplementations may only use hinting information developed undercomparable circumstances. For example, the hinting information may beconsidered available only when developed for a similar type of pagerenderer 115 (e.g., a similar browser type, etc.), when developed for asimilar client computational platform (e.g., a similar type of device, adevice with similar capabilities, etc.), when it is determined that theclient computer and/or the page renderer 115 can work with hints (e.g.,or with hints of the type available), when developed within a certaintimeframe preceding the request (e.g., so that the hints are fresh),when the hinting processor 130 can determine that no significantalterations have been made to the page, etc. At stage 212, the hintingprocessor 130 can receive the hinting request from the content server120. The hinting request can include information about the requestedpage, the requesting page renderer 115 (or client computer), etc. Insome embodiments, the page response can include one or more page objectsof the requested web page, one or more hinting scripts, and/or otherinformation. For example, the page response can be a root responsehaving the hinting script injected or otherwise included in theresponse.

At stage 216, the hinting processor 130 can generate a hinting responsein response to the hinting request, such that the hinting responseincludes hints directed to optimized fetching of an anticipated set ofthe page objects anticipated to be used to render the requested web pageaccording to hinting information maintained by the hinting processor130. The hinting response (i.e., and thereby the hints) can becommunicated, at stage 220, from the hinting processor 130 to thecontent server 120 in response to the hinting request. At stage 224, thecontent server 120 can direct the client page renderer 115 to render theweb page at least according to the hinting response (i.e., according tothe hints and, in some instances, other information).

In certain embodiments, the hinting response is communicated to the pagerenderer 115 as a hinting script, a feedback script, or in any othersuitable manner. For example, the hinting response (e.g., the hintingscript) can be implemented using the World Wide Web Consortia (W3C)resource timing and navigation application programming interfaces(APIs), which can define actions to record object timings and to confirmthat the timings can be shared with the content server 120. The API canadditionally use Internet Engineering Task Force (IETF) resource andnavigation timing definitions, and/or any other suitable definitions, todefine aspects of the script. The use of these or other elements in thehinting response can enable compatibility with standard page rendererswithout the need for customization to enable feedback information from afeedback script to be communicated from client computer 110 to contentserver 120. In other embodiments, customized page renderer modules orplug-ins can be installed on the page renderer 115 that can enablehinting and/or feedback scripts to be executed on a particular clientcomputer. In yet other embodiments, the page renderer 115 canincorporate built-in hinting processing and/or feedback functionalityand/or implement such functionality using a plug-in, extension, etc.

The method 200 continues on FIG. 2B with the page renderer 115 renderingthe web page at least according to the hinting response at stage 228.For example, rendering the page can include requesting additional pageobjects for the requested web page in accordance with the hints,receiving those requested page objects from the content server 120, andrendering the web page using the page objects (e.g., displaying visualobjects, such as text, images, etc.; playing and/or embeddingaudiovisual content, such as videos, music, etc.; executing scripts;etc.). In some implementations, the rendering effectively causes therequested page to be displayed in a graphical user interface of the pagerenderer 115. For the sake of illustration, the method 200 shows pageobjects being requested and returned in stages 228 and 232,respectively.

Having rendered the web page(s), the page renderer 115 can, as stage236, generate hinting feedback and communicate the hinting feedback inaccordance with the rendering. For example, while the page renderer 115renders the web page(s), it can monitor which page objects are actuallyrendered, order and/or other timing information relating to the loadingand rendering, and/or any other information than can be useful to thehinting processor 130 in generating future hints. In one implementation,while child requests and responses are occurring, a feedback script orother mechanism can identify timings associated with individual childobjects, identify uniform resource locators (URLs) for individualrendered objects, monitor overall timings for the entire web pagetransaction, monitor caching information for child objects cached atclient computer 110, monitor details associated with one or more domainname servers (DNS) that may be used during a lookup process for anobject, and/or monitor (e.g., track, derive, compute, etc.) any othersuch information that may be observed during the rendering.

At stage 240, the hinting feedback can be received at the hintingprocessor 130 from the client page renderer 115 subsequent to the clientpage renderer 115 rendering the web page at least according to thehinting response. In some implementations, the hinting feedback iscommunicated directly from the page renderer 115 to the hintingprocessor 130. In other implementations, the hinting feedback iscommunicated from the page renderer 115 to the content server 120 (e.g.,the content server 120 that is effectively controlling the pagetransaction). In such implementations, the content server 120 canforward (e.g., with or without modification) the hinting feedback to thehinting processor 130, as indicated by stage 238. The hinting feedbackcan be communicated in any suitable manner. For example, the hintingfeedback can be communicated all at one time, over multipletransactions, immediately after the web page is rendered, while the pageis being rendered, after some delay, etc.

At stage 244, the hinting processor 130 can update the hintinginformation according to the hinting feedback. Certain embodiments waituntil hinting feedback is seen by the hinting processor 130 for athreshold number of instances of an object or a web page transactionbefore associated hinting information is updated and/or beforeassociated hints are generated. In some implementations, hints generatedas a result of visiting one web page can be used to generate hints for adifferent but similar web page for which direct feedback is notavailable. For example, the feedback resulting from a visit to“www.latestnews.com” may be used to generate hints for a visit to“www.latestnews.” Similarly, some implementations permit hintinformation for an object that is used in multiple different web pagesto be used in web page transactions for different web pages. Forexample, if a picture is commonly used by many web pages, hintingfeedback about the picture object may be used to generate hints aboutthat picture object, and the hints for that picture object may becommunicated as part of a page response for any web page transactionthat includes the picture object.

Some embodiments support server-machine-driven hinting andclient-machine-driven feedback for multiple domains within a web page.For example, some web pages operate generally within a single domain (orhints and/or hinting feedback are generated only with respect to thedingle domain). In such instances, the client computer 110 can send apage request to the content server 120 requesting a web page. This canresult in hint requests and hint responses being communicated for allpage objects used to render that web page from the content server 120domain, and hinting feedback being communicated from the page renderer115 to the content server 120 (e.g., and/or the hinting processor 130)for all page objects rendered on that web page associated with thecontent server 120 domain. In other instances, web pages can includepage objects invoking (e.g., hosted via) multiple domains, sub-domains,etc. For example, the client computer 110 can send a page request to thecontent server 120 requesting a web page. This can result in hintrequests and hint responses being communicated to multiple contentservers 120 for page objects used to render that web page from therespective domains (and sub-domains) of those content servers 120, andhinting feedback being communicated from the page renderer 115 to themultiple content servers 120 (e.g., and/or multiple hinting processors130) for all objects rendered on that web page associated with therespective content server 120 domains.

FIGS. 3A and 3B show a flow diagram of another illustrative method 300for improving web page loading, according to alternative embodiments tothose described with reference to FIGS. 2A and 2B. FIGS. 3A and 3B,though spread over two pages, are intended to represent a single method300, where connector “A” links the portions of the method 300. Themethod 300 is described in context of system components described withreference to FIG. 1, including a page renderer 115, a content server120, and a hinting processor 130. Attribution of method stages toparticular system components is intended for added clarity, and shouldnot be construed as limiting the method stages to the particular systemarchitectures shown in FIG. 1.

Embodiments of the method 300 begin on FIG. 3A at stage 304 bycommunicating, from the client page renderer 115 to the content server120 over a communications network (e.g., network 140 of FIG. 0.1), apage request for a web page having a number of page objects. Stage 304can be similar to stage 204 described above with reference to FIG. 2A.At stage 308, the content server 120 can generate and communicate ahinting script in response to the page request, such that the hintingscript identifies a network location of the hinting processor 130. Forexample, executing the hinting script enables the page renderer 115 toestablish communications with an appropriate hinting processor 130 forretrieving hints relating to the requested web page. At stage 312, inaccordance with executing the script, the page renderer 115 cancommunicate a hinting request to the hinting processor 130. Referencesto “executing the script” herein are intended broadly to include anysimilar type of functionality. For example, the hinting script may notbe formulated as a script or other executable set of instructions;instead being formulated as an address or other information that thepage renderer 115 knows how to use to produce the desired functionality.In some implementations, generating and/or communicating the hintingscript by the content server 120 at stage 308, generating orcommunicating the hinting request by the page renderer 115 at stage 312,generating a hinting response by the hinting processor 130 (as in stage320 below), and/or other stages of the method 300 can be impacted bydeterminations similar to those described above with reference to stage208 of FIG. 2A. For example, the determinations can include determiningwhether hinting information is available for this page transaction,whether any hints (or underlying hinting information) are available fromprevious analyses of transactions involving the requested web page,whether related hinting information was developed under comparablecircumstances, etc. At stage 316, the hinting processor 130 can receivethe hinting request from the page renderer 115. The hinting request canbe similar to, or different from, the hinting request received from thecontent server 120 described above with reference to stage 212 of FIG.2A.

At stage 320, the hinting processor 130 can generate a hinting responsein response to the hinting request, such that the hinting responseincludes hints directed to optimized fetching of an anticipated set ofthe page objects anticipated to be used to render the requested web pageaccording to hinting information maintained by the hinting processor130. The hinting response can be similar to, or different from, thehinting response generated above with reference to stage 216 of FIG. 2A.At stage 324 (turning to FIG. 3B), the hinting response (i.e., andthereby the hints) can be communicated from the hinting processor 130 tothe requesting page renderer 115 in response to the hinting request.

The remaining stages of the method 300 are similar to those describedabove with reference to FIG. 2B, and are identified by the samereference numerals, accordingly. For example, the page renderer 115 canrender the web page at least according to the hinting response at stage228. For example, rendering the page can include requesting additionalpage objects for the requested web page in accordance with the hints,and the content server 120 returning those requested page objects to thepage renderer 115, as illustrated by stages 228 and 232, respectively.Having rendered the web page(s), the page renderer 115 can, as stage236, generate hinting feedback and communicate the hinting feedback inaccordance with the rendering. At stage 240, the hinting feedback can bereceived at the hinting processor 130 from the client page renderer 115subsequent to the client page renderer 115 rendering the web page atleast according to the hinting response. At stage 244, the hintingprocessor 130 can update the hinting information according to thehinting feedback.

FIG. 4 shows an illustrative page renderer that may be used with variousembodiments. The page renderer 400 can be an implementation of pagerenderer 115 of FIG. 1. As illustrated, the 4page renderer 400 caninclude a control module 410, renderer 420, rendered web page output422, parser 430, look ahead module(s) 432 a and 432 b, object fetcher440, render request 442, hint prefetch module(s) 450 a and 450 b, scriptexecuter 460, cache 470, hints 480, and hint memory 490. In someimplementations, the page renderer 400 is a client web browser.

As part of page renderer 400, control module 410 manages the requestsand responses for root and child objects, as well as the communicationbetween different elements of the page renderer 400. Object fetcher 440may manage the communication requests as they are made to and from acontent server, including handling caching of objects in cache 470.Parser 430 parses through web objects and may include look ahead 432that functions to perform a first level of prefetching for objects in aweb page transaction. Hint memory 490 and hint prefetch 450 may createand use data from previous web transactions to perform an additionallevel of transaction optimization through prefetching and/or cachemanagement. Renderer 420 renders the web page for output to rendered webpage output 422, which may be a computer display, a phone display, orany other suitable output for a page renderer 400 operating on acomputing device.

Script executor 460 executes code that may be part of an object. Thismay include a script (e.g., hinting scripts 145 of FIG. 1, feedbackscripts, etc.) received as part of a root response in an HTTP header oras HTML in the body of an object, child script objects that are part ofa web page transaction, and/or any other suitable scripts.

In one example, page renderer 400 is implemented as a web browser thatcan function to download and present a web page associated with the URL“www.latestnews.com” and four child object URLs: “LN-main.gif”;“LN.styles.css”; “LN.js”; and “1.gif&rand=96759.”

In an initial step as part of a transaction for such a web page, a rootrequest may be communicated to a web server computer when a user that isusing a client computer operating page renderer 400 makes a selectionwith a mouse click, a keyboard entry, touchscreen interaction, a searchquery, or any other appropriate action. When a root response to the rootrequest for “www.latestnews.com” is received by the client computer fromthe web server computer, the root response may include a feedback scriptin the HTTP header of the root response or in the HTML code of an objectthat is part of the root response. When this script is identified, itwill be sent to script executer 460. Script executer 460 may execute thefeedback script to gather feedback information for each of the childobjects. A standard web browser process may then proceed as part of theweb page transaction.

For such an example root response, parser 430 may then parse through theresponse and identify the first two child object URLs. Depending on therendering status, these first two child object URLs may be requested byrenderer 420 such that a message from render request 442 communicateswith the web server computer or another appropriate content server torequest these objects. Alternately, if renderer 420 is delayed inrequesting the initial child objects, look ahead 432 a may identify thechild object URLs from parser 430 and prefetch the objects via a requestfrom look ahead 432 b to the content server. The objects may then beprefetched either to cache 470 or to the renderer 420 in variousalternative embodiments. If the root response additionally includeshints, these hints may also be processed to identify additional childURLs. For example, if “LN.styles.css” includes references to tenadditional child objects, the hints may be used to pass URLs for theseten objects to look ahead 432 a prior to “LN.styles.css” even beingrequested by page renderer 400 (i.e., web browser). The hints mayinclude additional information that allow object fetcher 440 todetermine whether to prefetch the ten additional child objectsimmediately, in stages, or not to prefetch them at all. The more likelythese ten objects are to delay the overall web page render time, asindicated by the hints, the more aggressively the objects will beprefetched.

Child object 3 (“LN.js”), however, is a script, and is therefore sent toscript executer 460 rather than to parser 430. Script executer 460executes the child object and communicates any output to renderer 420.In the example of “www.latestnews.com” presented here, the result of“LN.js” may pass instructions for requesting child object 4 using“1.gif&rand=96759”, where “1.gif&rand=96759” is the URL for child object4 that is output from script executer 460. Renderer 420 will thenrequest child object 4 from a content server via render request module442. In certain embodiments, hints sent with the root response mayidentify that “LN.js” must be executed before the fourth URL can beidentified, and this may enable page renderer 400 to prioritize theexecution of “LN.js” in order to lower the overall page rendering time.

As described by FIG. 4, then, hints 480 may be identified by parser 430or other aspects of a controller, and sent to hint memory 490. Scriptexecuter 460, object fetcher 440, or any other module of page renderer400 may then perform actions based on hints 480 as stored in hint memory490 and analyzed by control module 410. This may allow hints not only toinitiate prefetching with hint prefetch 450 b, but also to enableverification of objects in cache 470 via hint prefetch 450 a. Further,renderer 420 may communicate specific details of the rendering process,including lists of child URLs, rendering times and timings forindividual child objects, and complete rendering times in a way thatenables feedback information to be captured by the feedback script beingexecuted by script executer 460.

Although FIG. 4 shows one potential embodiment of a page renderer inaccordance with aspects of the current innovations, alternative pagerenderers are consistent with these innovations. For example, while pagerenderer 400 includes cache 470, in alternative embodiments this mayinclude both browser cache 470 and other cache memory that may beexternal to the page renderer, or operating on a completely differentcomputing device from the page renderer. Similarly, the page renderermay use multiple history databases based on locally captured informationin addition to hints that are from a root response. Further, any of theelements may be integrated as part of the core function of the pagerenderer or coupled with any other element. Alternatively, in certainembodiments elements of the page renderer shown in FIG. 4 may functionas a plug-in module that works in conjunction with a page renderer. Forexample, the page renderer can be a web browser, a browser plugin, orany other suitable client application (e.g., including thin clients,apps, etc.).

FIG. 5 shows a timing flow 500 representing an example of a timing for asingle object of a web page. Single object timing 500 includes DNSlookup time 502, connection setup time 504, network delay and contentserver processing time 506, object transfer time 508, and local deviceprocessing 510. DNS lookup time 502 begins at lookup start 522 and endsat lookup end 524. Connection setup time 504 begins at connection start526 and ends at connection complete 528. In some instances, it isdesirable to establish a secure connection, for example, in context ofhypertext transport protocol secure (HTTPS). In such instances,subsequent to completing the connection setup time at connectioncomplete 528 (e.g., after setting up a TCP connection), there can be asecure connection setup time 505 that begins at secure connection start538 and ends at secure connection complete 540. Network delay andcontent server processing time 506 begins with object request 530 andends with start receiving object 532. Object transfer time 508 beginswith start receiving object 532 and ends with finish receiving object534. The overall single object timing 500 ends with finish processingobject 536. In certain embodiments, elements 522 through 536 may beassociated with clock times of a device, with the time elements 502through 510 determined by the differences between the clock timesassociated with elements 522 through 536.

While this particular set of object timings may occur as a series ofsteps in a process beginning with block 502 and proceeding in timethrough the end of block 510, any step and object timings for objecttransfer may be understood to function with the innovations describedherein. In a typical object transaction, a DNS lookup time 502, whichdescribes the time required to translate a URL into an IP address usingDNS systems may be in the order of thirty milliseconds for a terrestrialbroadband system, a connection setup time 504 for a TCP connection maybe on the same order of magnitude unless the server is slow to make theconnection. For other types of connections, different connection setuptimes may apply. A network delay and content server processing time 506and an object transfer time 508, however, may vary greatly depending onthe server, the type of request, the size of the object, and theconnection bandwidth. The network delay and content server processingtime 506 refers to the amount of time from when a page renderer sends anobject request 530 and when the page renderer starts receiving theobject at start receiving object 532. If the web server computer is slowto process the request, this may result in block 506 being a relativelylarge amount of time.

In certain embodiments, hints may identify a content server with a longnetwork delay and content server processing time 506, and provide a pagerenderer with a CDN that may enable the page renderer to retrieve theobject from a different place. Similarly, if a content server isbandwidth constrained, object transfer time 508 may vary greatly, andthe use of an alternate content source for an object may reduce theoverall object timing by a significant amount that lowers an overallrender time for a web page transaction. Many types of hints are possiblefor improving web page load performance, including, for example, URLsfor web objects, web object freshness meta-data, web object size, webobject type, web object fingerprint or checksum (e.g., used to validatethe content that is about to be fetched), probability that a web objectwill be used (e.g., expressed as a function of time), web objectpriority (e.g., its relative importance in the page rendering process),web object relative timing (e.g., when it will be needed during the pagerendering process), web object dependencies (e.g., includingdependencies on other objects and cookies), scripts that the requestingagent may execute to dynamically create hinted URLs, domain name hintsthat enable the requesting agent to pre-resolve domains, redirect chainhints (e.g., including cookie meta-data that can inform the requestingagent whether it needs to wait for cookies to be set before fetchingselect objects), TCP connection usage hints that inform the requestingagent as to how to best allocate TCP connections to requests, secureconnection pre-connect hints that inform the requesting agent topre-establish secure connections and that may provide metadata thatreduces the number of round trips for establishing those connections,signature information to secure and validate the hint, hint freshnessand expiry, metadata about the hint response that may be used inpost-processing analysis, etc.

For a simple content server processing time as part of block 506 on afast server, the timing may be measured in milliseconds, but for a slowserver or a complex database query made to a slow or very largedatabase, the server processing time may be seconds, minutes, or longer.Similarly, for a large file being downloaded over a connection where thebandwidth is not large compared to the file size, object the transfertime 508 may be much longer than single or double digit millisecondtimings.

Additionally, the “render time” for a web page which is shown as localdevice processing time 510 may be used as web page load timinginformation for web page objects. Render time is the time that theobject is actually used by a page renderer. For instances where a systemneeds to prioritize objects, render time may function along withdependency information, download time, content server response time, andany other information that impacts a final page load to prioritizeobject fetching, and thus hints provided by systems described herein maybe influenced by the render time at a local device.

This overall single object timing 500, then, is determined by the chainof timing factors from lookup start 522 until finish processing object536. In other embodiments, additional timings may be included withinthese timings or prior to lookup start 522. For an entire web page,multiple objects that must be downloaded serially, thus repeating theobject timings listed above, may further add to a timing for renderingof an entire web page. An entire web page transaction may be made up ofmultiple a single object transactions or a very large number of objecttransactions, where each object transaction may include timings similarto those shown in single object timing 500 of FIG. 5.

FIG. 6 shows a timing chart for one potential embodiment of a web pagetransaction that may be analyzed and accelerated in accordance withembodiments of the present innovations. The chart shows a list ofobjects with a total timing and size at the bottom, and a positionduring the entire transaction when each object has an associated requestand response. The root request of FIG. 6 is labeled as 602, with a rootresponse size of 292 bytes and a 2.05 second request/response time thatbegins at the very beginning of the web page transaction. The web pagetransaction includes a number of child requests and responses that areshown as beginning after the completion of the root response. The childrequests and responses occur in several stages, with the final set ofrequests occurring at the time shown by the line indicated by 604, andthe final response ends roughly at the timing line indicated by timing606. At the time indicated by timing 606, the web transaction iscomplete and ready for complete display to a user.

If the web page transaction of FIG. 6, where each object has a singleobject timing (e.g., similar to single object timing 500 of FIG. 5), isperformed using a page renderer (e.g., such as web page renderer 400 ofFIG. 4 with a feedback script being executed by script executer 460),significant amounts of feedback information may be generated. Such anembodiment may be implemented using the standardized W3C resource timingAPI, which can provide detailed network timing data for each object.Such an API is available to any web page. In some web browsers, this APIcan be implemented as part of a global “window.performance” object, witha “performance.getEntries” that returns an array of resource timingobjects.

Referring back, for example, to related portions of FIG. 5, each oflookup start 522, lookup end 524, connection start 526, connectioncomplete 528, object request 530, receiving object 532, finish receivingobject 534, and finish processing object 536 may be associated with aparticular resource timing object as part of the W3C resource timingAPI. The feedback script may call these resource timing objects inassociation with each object to receiving time values for each element.These time values may then be sent to a web server computer as feedbackinformation. These time values may then be processed to calculate theassociated times 502 through 510, and these times may be used todetermine hints including aggressiveness levels for prefetchingindividual objects as part of a web page transaction.

In various other embodiments, other standardized APIs or customized APIsmay be used not only for these timing objects, but also for cachinginformation, URL information, and any other such information thatrelates to the web page transaction.

FIG. 7 provides a schematic illustration of one embodiment of a computersystem 700 that can perform the methods of the invention, as describedherein, and/or can function, for example, as any part of clientcomputer(s) 110, content server(s) 120, hinting processor(s) 130, or anyother such computer or device. It should be noted that FIG. 7 is meantonly to provide a generalized illustration of various components, any orall of which may be utilized, as appropriate. FIG. 7 therefore broadlyillustrates how individual system elements may be implemented in arelatively separated or relatively more integrated manner.

The computer system 700 is shown comprising hardware elements that canbe electrically coupled via a bus 705 (or may otherwise be incommunication, as appropriate). The hardware elements can include one ormore processors 710, including, without limitation, one or moregeneral-purpose processors and/or one or more special-purpose processors(such as digital signal processing chips, graphics acceleration chips,and/or the like); one or more input devices 715, which can include,without limitation, a mouse, a keyboard, touchscreen, and/or the like;and one or more output devices 720, which can include, withoutlimitation, a display device, a printer, and/or the like.

The computer system 700 may further include (and/or be in communicationwith) one or more storage devices 725, which can comprise, withoutlimitation, local and/or network accessible storage and/or can include,without limitation, a disk drive, a drive array, an optical storagedevice, a solid-state storage device such as a random access memory(“RAM”) and/or a read-only memory (“ROM”), which can be programmable,flash-up dateable, and/or the like. The computer system 700 might alsoinclude a communications subsystem 730, which can include, withoutlimitation, a modem, a network card (wireless or wired), an infraredcommunication device, a wireless communication device, and/or chipset(such as an 802.11 device, a WiFi device, a WiMax device, cellularcommunication facilities, etc.), and/or the like. The communicationssubsystem 730 may permit data to be exchanged with a network (such asthe network described below, to name one example), and/or any otherdevices described herein. In many embodiments, the computer system 700will further comprise a working memory 735, which can include a RAM orROM device, as described above.

The computer system 700 also can comprise software elements, shown asbeing currently located within the working memory 735, including anoperating system 740 and/or other code, such as one or more applications745, which may comprise computer programs of the invention and/or may bedesigned to implement methods of the invention and/or configure systemsof the invention, as described herein. Merely by way of example, one ormore procedures described with respect to the method(s) discussed abovemight be implemented as code and/or instructions executable by acomputer (and/or a processor within a computer). A set of theseinstructions and/or code might be stored on a computer-readable storagemedium, such as the storage device(s) 725 described above. In somecases, the storage medium might be incorporated within a computersystem, such as the system 700. In other embodiments, the storage mediummight be separate from a computer system (i.e., a removable medium, suchas a compact disc, etc.), and/or provided in an installation package,such that the storage medium can be used to program a general-purposecomputer with the instructions/code stored thereon. These instructionsmight take the form of executable code, which is executable by thecomputer system 700, and/or might take the form of source and/orinstallable code which, upon compilation and/or installation on thecomputer system 700 (e.g., using any of a variety of generally availablecompilers, installation programs, compression/decompression utilities,etc.), then takes the form of executable code. In certain embodiments,this may include page renderer functionality and may include separatepage renderer modules as part of this page renderer functionalityexecuted by a process to enable display of a web page on an outputdevice 720 of such a computer system 700.

It will be apparent to those skilled in the art that substantialvariations may be made in accordance with specific requirements. Forexample, customized hardware might also be used, and/or particularelements might be implemented in hardware, software (including portablesoftware, such as applets, etc.), or both. Further, connection to othercomputing devices such as network input/output devices may be employed.

In one aspect, the invention employs a computer system (such as thecomputer system 700) to perform methods of the invention. According to aset of embodiments, some or all of the procedures of such methods areperformed by the computer system 700 in response to processor 710executing one or more sequences of one or more instructions (which mightbe incorporated into the operating system 740 and/or other code, such asan application 745) contained in the working memory 735. Suchinstructions may be read into the working memory 735 from anothermachine-readable medium, such as one or more of the storage device(s)725. Merely by way of example, execution of the sequences ofinstructions contained in the working memory 735 might cause theprocessor(s) 710 to perform one or more procedures of the methodsdescribed herein.

The terms “machine-readable medium” and “computer-readable medium”, asused herein, refer to any medium that participates in providing datathat causes a machine to operate in a specific fashion. In an embodimentimplemented using the computer system 700, various machine-readablemedia might be involved in providing instructions/code to processor(s)710 for execution and/or might be used to store and/or carry suchinstructions/code (e.g., as signals). In many implementations, acomputer-readable medium is a physical and/or tangible storage medium.Such a medium may take many forms including, but not limited to,non-volatile media. Non-volatile media includes, for example, optical ormagnetic disks, such as the storage device(s) 725. Common forms ofphysical and/or tangible computer-readable media include, for example, aflexible disk, hard disk, magnetic tape or any other magnetic medium, aCD-ROM or any other optical medium, solid-state circuit based memory orany other memory chip or cartridge, or any other medium from which acomputer can read instructions and/or code. Various forms ofmachine-readable media may be involved in carrying one or more sequencesof one or more instructions to the processor(s) 710 for execution.Merely by way of example, the instructions may initially be carried on amemory of a remote computer. A remote computer might load theinstructions into its dynamic memory and send the instructions assignals over a transmission medium to be received and/or executed by thecomputer system 700.

The communications subsystem 730 (and/or components thereof) generallywill receive the signals, and the bus 705 might then carry the signals(and/or the data, instructions, etc., carried by the signals) to theworking memory 735, from which the processor(s) 710 retrieves andexecutes the instructions. The instructions received by the workingmemory 735 may optionally be stored on a storage device 725 eitherbefore or after execution by the processor(s) 710.

A set of embodiments includes systems for implementing improved web pagerendering and improved network resource usage based, for example, on thecreation and use of sets of hints from embedded feedback scripts and/orthe like. FIG. 8 illustrates a schematic diagram of a network system 800that can be used in accordance with one set of embodiments. In suchembodiments, the network system 800 may represent any number of clientand server devices that enable content to be communicated from contentproviders to user systems as part of web page transactions across anetwork. The system 800 can include one or more user computers 805, suchas computers for implementing client computer(s) 110 of FIG. 1. The usercomputers 805 can be general-purpose personal computers and/or can haveany of a variety of applications, including one or more applicationsconfigured to perform methods of the invention, as well as one or moreoffice applications, database client and/or server applications, andpage renderer applications. Alternatively, the user computers 805 can beany other electronic device, such as a thin-client computer,Internet-enabled mobile telephone, tablet computer, phablet, wearabledevice, Internet-enabled appliance, and/or personal digital assistant(PDA) capable of communicating via a network (e.g., the network 810described below) and/or displaying and navigating web pages or othertypes of electronic documents. Although the exemplary system 800 isshown with three user computers 805 a-c, any number of user computerscan be supported.

Certain embodiments of the invention operate in a networked environment,which can include a network 810, such as for implementing the network140 of FIG. 1. The network 810 can be any type of network familiar tothose skilled in the art that can support data communications using anyof a variety of commercially-available protocols, including, withoutlimitation, TCP/IP, UDP/IP, SNA, IPX, and the like. Merely by way ofexample, the network 810 can be a local area network (“LAN”), including,without limitation, an Ethernet network, a Token-Ring network and/or thelike; a wide-area network (WAN); a virtual network, including, withoutlimitation, a virtual private network (“VPN”); the Internet; anintranet; an extranet; a public switched telephone network (“PSTN”); aninfrared network; a wireless network, including, without limitation, anetwork operating under any of the IEEE 802.11 suite of protocols, orany other wireless protocol; and/or any combination of these and/orother networks.

Embodiments of the invention can include one or more servers 815 (orsimilar types of computational systems). Embodiments of the servers 815can be used to implement the content server(s) 120 and/or the hintingprocessor(s) 130. As described above, the hinting processor(s) 130 canalso be part of one or more content servers 120, which can beimplemented as one or more of the servers 815. Each of the servers 815may be configured with an operating system, including, withoutlimitation, any of those discussed above, as well as any commercially(or freely) available server operating systems. Each of the servers 815may also be running one or more applications, which can be configured toprovide services to one or more user computers 805 and/or other servers815.

Merely by way of example, one of the servers 815 may be a web server,which can be used, merely by way of example, to process requests for webpages or other electronic documents from user computers 805. The webserver can also run a variety of server applications, including HTTPservers, FTP servers, CGI servers, database servers, Java® 1 servers,and the like. In some embodiments of the invention, the web server maybe configured to serve web pages that can be operated within a pagerenderer on one or more of the user computers 805 to perform methods ofthe invention. In certain embodiments, the servers 815 may also includeCDN devices which provide similar or identical content from an alternateserver than the primary content server which is a source for particularobjects in a web page transaction.

The servers 815, in some embodiments, might include one or moreapplication servers, which can include one or more applicationsaccessible by a client running on one or more of the user computers 805and/or other servers 815. Merely by way of example, the server(s) 815can be one or more general-purpose computers capable of executingprograms or scripts in response to the user computers 805 and/or otherservers 815, including, without limitation, web applications (whichmight, in some cases, be configured to perform methods of theinvention). Merely by way of example, a web application can beimplemented as one or more scripts or programs written in any suitableprogramming language. The application server(s) can also includedatabase servers which can process requests from clients (including,depending on the configurator, database clients, API clients, pagerenderers, etc.) running on a user computer 805 and/or another server815. In some embodiments, an application server can create web pagesdynamically for displaying the information in accordance withembodiments of the invention, such as information displayed as part ofvarious page renderers discussed herein. Data provided by an applicationserver may be formatted as web pages (comprising HTML, JavaScript®,etc., for example) and/or may be forwarded to a user computer 805 via aweb server (as described above, for example). Similarly, a web servermight receive web page requests and/or input data from a user computer805 and/or forward the web page requests and/or input data to anapplication server. In some cases, a web server may be integrated withan application server.

In accordance with further embodiments, one or more servers 815 canfunction as a file server and/or can include one or more of the files(e.g., application code, data files, etc.) necessary to implementmethods of the invention incorporated by an application running on auser computer 805 and/or another server 815. Alternatively, as thoseskilled in the art will appreciate, a file server can include allnecessary files, allowing such an application to be invoked remotely bya user computer 805 and/or server 815. It should be noted that thefunctions described with respect to various servers herein (e.g.,application server, database server, web server, file server, etc.) canbe performed by a single server and/or a plurality of specializedservers, depending on implementation-specific needs and parameters.

In certain embodiments, the system can include one or more databases820, such as for storing hinting information 135, web pages 125 and/orpage objects 127, and/or any other suitable data used by systems andmethods of various embodiments. Such databases may include stores of webtransaction history and hints derived from this web transaction history.Any supporting details related to creation of such hints mayadditionally be stored in such a database. The location of thedatabase(s) 820 is discretionary: merely by way of example, a database820 a might reside on a storage medium local to (and/or resident in) aserver 815 a (and/or a user computer 805). Alternatively, a database 820b can be remote from any or all of the computers 805 or servers 815 a,b,so long as the database 820 b can be in communication with one or moreof these (e.g., via the network 810). In a particular set ofembodiments, a database 820 can reside in a storage-area network (“SAN”)familiar to those skilled in the art. Likewise, any necessary files forperforming the functions attributed to the computers 805 or servers 815can be stored locally on the respective computer and/or remotely, asappropriate. In one set of embodiments, the database 820 can be arelational database that is adapted to store, update, and retrieve datain response to SQL-formatted commands. The database might be controlledand/or maintained by a database server, as described above, for example.

In any embodiment described herein, any communication, hypertexttransport protocol (HTTP) request or response, web page transaction,portion of a web page transaction, or any combination of anycommunications in whole or in part that may use HTTP may also beimplemented using hypertext transport protocol secure (HTTPS). The useof HTTPS involves encryption and various security measures, and anyembodiment described herein may be adapted to implement systems andmethods described herein to accommodate the encryption and securityassociated with HTTPS in a number of ways.

In certain embodiments, proxy devices involved in any communicationdescribed herein may be provided with details associated with HTTPScommunications in order to enable any proxy device functionalitydescribed herein. Such details may be provided by a user device withuser consent to enable proxy device or hinting server device interactionwith the user's communications. This may enable decryption of HTTPScommunication by the proxy to enable any functionality described herein.Such details to enable decryption may also be provided by a contentserver or content server operator to enable proxy device interactionwith the content provider's communications. For aspects of embodimentsdescribed herein relating to client-side functionality or page rendererfunctionality, certain embodiments may function with the sameimplementation described above for proxy devices. This functionality maybe used as well with any other server side or content device.

In other embodiments, rather than a proxy decryption of HTTPScommunications, a browser on a user device may interact with a proxydevice or a hinting server device independent of the original HTTPScommunication to provide details of the HTTPS communication to the proxydevice or hinting server device. In a user device page renderer, thismay involve the use of a page renderer module, page renderer plug-in, orpage renderer with specialized core functionality to observe HTTPScommunications before they are encrypted. If needed, the independentcommunications with the proxy device or hinting server device may thenadditionally be subject to security similar to the security used for theoriginal HTTPS communication. For embodiments described herein which mayinvolve integration with content provider systems or reverse proxysystems, HTTPS communication received at the content provider system orreverse proxy may be used as part of the embodiments described hereinafter the HTTPS communication is decrypted by the content providersystem or reverse proxy. Thus, any “observing” or “identifying”functionality described herein may be performed with HTTPScommunications for client computers, proxy devices, and content providerdevices. Similarly, any embodiment described herein may be implementedwith other secure connection and communication systems or protocols inaddition to HTTPS described above.

Certain embodiments described herein refer to proxy devices or proxysystems. As described herein, proxy devices may be one or more devicesoperating as part of a system to intercept communications between userdevices and content devices. Such proxies may be transparent to the userand content devices, or may be part of a multi-step communication pathwhich is apparent to user and content devices. In certain embodiments,proxy devices may function as part of a forward proxy system, wherecommunications from a group of user devices are all communicated to abroader network (such as the Internet) via the forward proxy system. Inalternate embodiments, the proxy devices may function as part of reverseproxy systems, where a reverse proxy system operates as an access pathto a number of content server devices. It will be apparent thatembodiments described herein as including a proxy will apply to bothforward proxy systems and reverse proxy systems, and any configurationof a system including a proxy, given appropriate accommodations for theparticular system structure.

The methods disclosed herein include one or more actions for achievingthe described method. The method and/or actions can be interchanged withone another without departing from the scope of the claims. In otherwords, unless a specific order of actions is specified, the order and/oruse of specific actions can be modified without departing from the scopeof the claims.

The functions described can be implemented in hardware, software,firmware, or any combination thereof. If implemented in software, thefunctions can be stored as one or more instructions on a tangiblecomputer-readable medium. A storage medium can be any available tangiblemedium that can be accessed by a computer. By way of example, and notlimitation, such computer-readable media can include RAM, ROM, EEPROM,CD-ROM, or other optical disk storage, magnetic disk storage, or othermagnetic storage devices, or any other tangible medium that can be usedto carry or store desired program code in the form of instructions ordata structures and that can be accessed by a computer. Disk and disc,as used herein, include compact disc (CD), laser disc, optical disc,digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disksusually reproduce data magnetically, while discs reproduce dataoptically with lasers.

A computer program product can perform certain operations presentedherein. For example, such a computer program product can be a computerreadable tangible medium having instructions tangibly stored (and/orencoded) thereon, the instructions being executable by one or moreprocessors to perform the operations described herein. The computerprogram product can include packaging material. Software or instructionscan also be transmitted over a transmission medium. For example,software can be transmitted from a website, server, or other remotesource using a transmission medium such as a coaxial cable, fiber opticcable, twisted pair, digital subscriber line (DSL), or wirelesstechnology such as infrared, radio, or microwave.

Further, modules and/or other appropriate means for performing themethods and techniques described herein can be downloaded and/orotherwise obtained by suitable terminals and/or coupled to servers, orthe like, to facilitate the transfer of means for performing the methodsdescribed herein. Alternatively, various methods described herein can beprovided via storage means (e.g., RAM, ROM, a physical storage mediumsuch as a CD or floppy disk, etc.), such that a user terminal and/orbase station can obtain the various methods upon coupling or providingthe storage means to the device. Moreover, any other suitable techniquefor providing the methods and techniques described herein to a devicecan be utilized. Features implementing functions can also be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations.

In describing the present invention, the following terminology will beused: The singular forms “a,” “an,” and “the” include plural referentsunless the context clearly dictates otherwise. Thus, for example,reference to an item includes reference to one or more items. The terms“one” or “ones” refers to one, two, or more, and generally applies tothe selection of some or all of a quantity. The term “plurality” refersto two or more of an item. The term “about” means quantities,dimensions, sizes, formulations, parameters, shapes and othercharacteristics need not be exact, but can be approximated and/or largeror smaller, as desired, reflecting acceptable tolerances, conversionfactors, rounding off, measurement error and the like and other factorsknown to those of skill in the art. The term “substantially” means thatthe recited characteristic, parameter, or value need not be achievedexactly, but that deviations or variations including, for example,tolerances, measurement error, measurement accuracy limitations andother factors known to those of skill in the art, can occur in amountsthat do not preclude the effect the characteristic was intended toprovide. Numerical data can be expressed or presented herein in a rangeformat. It is to be understood that such a range format is used merelyfor convenience and brevity and thus should be interpreted flexibly toinclude not only the numerical values explicitly recited as the limitsof the range, but also interpreted to include all of the individualnumerical values or sub-ranges encompassed within that range as if eachnumerical value and sub-range is explicitly recited. As an illustration,a numerical range of “about 1 to 5” should be interpreted to include notonly the explicitly recited values of about 1 to about 5, but alsoinclude individual values and sub-ranges within the indicated range.Thus, included in this numerical range are individual values such as 2,3 and 4 and sub-ranges such as 1-3, 2-4 and 3-5, etc. This sameprinciple applies to ranges reciting only one numerical value (e.g.,“greater than about 1”) and should apply regardless of the breadth ofthe range or the characteristics being described. A plurality of itemscan be presented in a common list for convenience. However, these listsshould be construed as though each member of the list is individuallyidentified as a separate and unique member. Thus, no individual memberof such list should be construed as a de facto equivalent of any othermember of the same list solely based on their presentation in a commongroup without indications to the contrary. Furthermore, where the terms“and” and “or” are used in conjunction with a list of items, they are tobe interpreted broadly, in that any one or more of the listed items canbe used alone or in combination with other listed items. The term“alternatively” refers to selection of one of two or more alternatives,and is not intended to limit the selection to only those listedalternatives or to only one of the listed alternatives at a time, unlessthe context clearly indicates otherwise. The term “coupled” as usedherein does not require that the components be directly connected toeach other. Instead, the term is intended to also include configurationswith indirect connections where one or more other components can beincluded between coupled components. For example, such other componentscan include amplifiers, attenuators, isolators, directional couplers,redundancy switches, and the like. Also, as used herein, including inthe claims, “or” as used in a list of items prefaced by “at least oneof” indicates a disjunctive list such that, for example, a list of “atleast one of A, B, or C” means A or B or C or AB or AC or BC or ABC(i.e., A and B and C). Further, the term “exemplary” does not mean thatthe described example is preferred or better than other examples.Similarly, terms, such as “optimize” are not intended to limitembodiments to an optimal approach or result, but rather to expressseeking movement toward an optimal result (e.g., to improve, etc.). Asused herein, a “set” of elements is intended to mean “one or more” ofthose elements, except where the set is explicitly required to have morethan one or explicitly permitted to be a null set.

Various changes, substitutions, and alterations to the techniquesdescribed herein can be made without departing from the technology ofthe teachings as defined by the appended claims. Moreover, the scope ofthe disclosure and claims is not limited to the particular aspects ofthe process, machine, manufacture, composition of matter, means,methods, and actions described above. Processes, machines, manufacture,compositions of matter, means, methods, or actions, presently existingor later to be developed, that perform substantially the same functionor achieve substantially the same result as the corresponding aspectsdescribed herein can be utilized. Accordingly, the appended claimsinclude within their scope such processes, machines, manufacture,compositions of matter, means, methods, or actions.

That which is claimed is:
 1. A method for improving web page loadingtime in a communications network, the method comprising: receiving arequest for hints at a hinting processor from a content server, therequest for hints generated by the content server based on a pagerequest received by the content server from a client page renderer, thepage request being for a web page stored at the content server andcomprising a plurality of page objects; generating a hinting response bythe hinting processor in response to the request for hints, the hintingresponse comprising hints indicating an anticipated set of page objectsthat might be requested by the client page renderer during a web pagetransaction corresponding to the web page to render the web page, thehints based on hinting information maintained by the hinting processor;communicating the hinting response from the hinting processor to thecontent server in response to the request for hints, thereby causing thecontent server to direct the client page renderer to render the web pageat least according to the hinting response; receiving hinting feedbackat the hinting processor from the client page renderer subsequent to theclient page renderer rendering the web page at least according to thehinting response, the hinting feedback indicating a rendered set of pageobjects used to render the web page; and updating the hintinginformation according to the hinting feedback.
 2. The method of claim 1,wherein the request for hints is received at the hinting processor fromthe content server over the communications network.
 3. The method ofclaim 1, wherein the content server comprises the hinting processor. 4.The method of claim 1, wherein: the hints comprise a list of uniformresource locators (URLs) for the anticipated set of page objects; andupdating the hinting information comprises updating the list of URLsaccording to the rendered set of page objects used to render the webpage.
 5. The method of claim 1, wherein: the hints identify, for atleast one of the anticipated set of page objects served by a contentserver previously determined to manifest a first network delay and/orprocessing time, an alternative content server with network delay and/orprocessing time less than the first network delay from which the pageobject is retrievable.
 6. The method of claim 1, wherein the hintinginformation comprises: timing information associated with rendering theweb page; and a prefetch aggressiveness value for at least some of therendered set of page objects based on the timing information associatedwith rendering the web page.
 7. The method of claim 1, wherein thehinting feedback comprises page load statistics.
 8. The method of claim1, wherein the hinting feedback is received by the hinting processordirectly from the client page renderer.
 9. The method of claim 1,wherein the hinting feedback is received by the hinting processor fromthe client page renderer via the content server.
 10. The method of claim1, wherein: the hinting processor is located remotely from the contentserver, the receiving the request for hints comprises receiving therequest for hints over a communications network between the hintingprocessor and the content server, and the communicating the hintingresponse comprises sending the hinting response over the communicationsnetwork to the content server.
 11. A device for improving web pageloading time in a communications network comprising: a non-transitorycomputer-readable medium; and a processor in communication with thenon-transitory computer-readable medium, the processor configured toexecute processor-executable instructions stored in the non-transitorycomputer-readable medium to: receive a request for hints at a hintingprocessor from a content server, the request for hints generated by thecontent server based on a page request received by the content serverfrom a client page renderer, the page request being for a web pagestored at the content server and comprising a plurality of page objects;generate a hinting response by the hinting processor in response to therequest for hints, the hinting response comprising hints indicating ananticipated set of page objects that might be requested by the clientpage renderer during a web page transaction corresponding to the webpage to render the web page, the hints based on hinting informationmaintained by the hinting processor; communicate the hinting responsefrom the hinting processor to the content server in response to therequest for hints, thereby causing the content server to direct theclient page renderer to render the web page at least according to thehinting response; receive hinting feedback at the hinting processor fromthe client page renderer subsequent to the client page rendererrendering the web page at least according to the hinting response, thehinting feedback indicating a rendered set of page objects used torender the web page; and update the hinting information according to thehinting feedback.
 12. The device of claim 11, wherein the request forhints is received at the hinting processor from the content server overthe communications network.
 13. The device of claim 11, wherein thecontent server comprises the hinting processor.
 14. The device of claim11, wherein: the hints comprise a list of uniform resource locators(URLs) for the anticipated set of page objects; and the processor isfurther configured to execute processor-executable instructions storedin the non-transitory computer-readable medium to update the hintinginformation based on updating the list of URLs according to the renderedset of page objects used to render the web page.
 15. The device of claim11, wherein: the hints identify, for at least one of the anticipated setof page objects served by a content server previously determined tomanifest a first network delay and/or processing time, an alternativecontent server with network delay and/or processing time less than thefirst network delay from which the page object is retrievable.
 16. Thedevice of claim 11, wherein the hinting information comprises: timinginformation associated with rendering the web page; and a prefetchaggressiveness value for at least some of the rendered set of pageobjects based on the timing information associated with rendering theweb page.
 17. The device of claim 11, wherein the hinting feedbackcomprises page load statistics.
 18. The device of claim 11, wherein thehinting feedback is received by the hinting processor directly from theclient page renderer.
 19. The device of claim 11, wherein the hintingfeedback is received by the hinting processor from the client pagerenderer via the content server.
 20. The device of claim 11, wherein:the hinting processor is located remotely from the content server, theprocessor configured to execute processor-executable instructions storedin the non-transitory computer-readable medium to: receive the requestfor hints including receiving the request for hints over acommunications network between the hinting processor and the contentserver, and communicate the hinting response including sending thehinting response over the communications network to the content server.21. A non-transitory computer-readable medium comprisingprocessor-executable instructions configured to cause the processor to:receive a request for hints at a hinting processor from a contentserver, the request for hints generated by the content server based on apage request received by the content server from a client page renderer,the page request being for a web page stored at the content server andcomprising a plurality of page objects; generate a hinting response bythe hinting processor in response to the request for hints, the hintingresponse comprising hints indicating an anticipated set of page objectsthat might be requested by the client page renderer during a web pagetransaction corresponding to the web page to render the web page, thehints based on hinting information maintained by the hinting processor;communicate the hinting response from the hinting processor to thecontent server in response to the request for hints, thereby causing thecontent server to direct the client page renderer to render the web pageat least according to the hinting response; receive hinting feedback atthe hinting processor from the client page renderer subsequent to theclient page renderer rendering the web page at least according to thehinting response, the hinting feedback indicating a rendered set of pageobjects used to render the web page; and update the hinting informationaccording to the hinting feedback.
 22. The non-transitorycomputer-readable medium of claim 21, wherein the request for hints isreceived at the hinting processor from the content server over acommunications network.
 23. The non-transitory computer-readable mediumof claim 21, wherein the content server comprises the hinting processor.24. The non-transitory computer-readable medium of claim 21, wherein:the hints comprise a list of uniform resource locators (URLs) for theanticipated set of page objects; and and further comprisingprocessor-executable instructions configured to cause the processor toupdate the hinting information based on updating the list of URLsaccording to the rendered set of page objects used to render the webpage.
 25. The non-transitory computer-readable medium of claim 21,wherein: the hints identify, for at least one of the anticipated set ofpage objects served by a content server previously determined tomanifest a first network delay and/or processing time, an alternativecontent server with network delay and/or processing time less than thefirst network delay from which the page object is retrievable.
 26. Thenon-transitory computer-readable medium of claim 21, wherein the hintinginformation comprises: timing information associated with rendering theweb page; and a prefetch aggressiveness value for at least some of therendered set of page objects based on the timing information associatedwith rendering the web page.
 27. The non-transitory computer-readablemedium of claim 21, wherein the hinting feedback comprises page loadstatistics.
 28. The non-transitory computer-readable medium of claim 21,wherein the hinting feedback is received by the hinting processordirectly from the client page renderer.
 29. The non-transitorycomputer-readable medium of claim 21, wherein the hinting feedback isreceived by the hinting processor from the client page renderer via thecontent server.
 30. The non-transitory computer-readable medium of claim21, wherein: the hinting processor is located remotely from the contentserver, and further comprising processor-executable instructionsconfigured to cause the processor to: receive the request for hintsincluding receiving the request for hints over a communications networkbetween the hinting processor and the content server, and communicatethe hinting response including sending the hinting response over thecommunications network to the content server.